McCarthy showed no signs of a broken heart on Saturday, when an eyewitness saw the 38-year-old actress dancing the night away at Hollywood producer JenniferKlein's holiday party, sponsored by Grey Goose.

When one of McCarthy's pals asked if she had time to catch up, McCarthy said, "'I need a night out. I'll be here for the night for sure! I want to party!'" the onlooker tells Us. "And she did! She danced all night."